Connecting External Status LEDs


By richardmckenna 17 February 2017 15:08

Member · 5 comments


So I have my DuetWiFi mounted at the bottom of my printer with a cover over the electronics. Unfortunately this means I cannot see any of the status LEDs on the board.

Say I wanted to mount some coloured LEDs at the front of the case, is there any way of wiring these to the DuetWiFI to replicated the status LEDs?

If not then my other option is to use 1mm fibre optic like … xyObBTlggN to guide the light to where I want it on the case. I'll just need to figure out how to connect it to the LEDs on the board.


By T3P3Tony 17 February 2017 15:54

Administrator · 579 comments

Hi Richard

There are a number of LEDs on the board and the answer is different depending on which one. It will be helpful to follow along on the wiring diagram

3.3V&5V you can connect an external LED with appropriate resistor between 3.3V/5V on the expansion header and ground on the expansion header.
VIN - if you are not using both always on FAN connections you can connect a LED and resistor across these to get 12V/24V indication.

Heater&Bed LEDs.
You can connect a resistor and LED in parallel with the E0,E1 and bed heaters (via the screw terminals) to get an indication of these

Endstop LEDs
Assuming you are using standard micro switches you can connect an LED and resistor between the 3.3V and the N_STOP pins on the endstop connectors.

Duet Wifi Hardware Designer


By richardmckenna 18 February 2017 21:15

Member · 5 comments

Thanks Tony, I think that covers it. I will post back with my results.

I don't suppose you have part numbers for the smd leds used on the board?